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Cassette change question on 2013 R3

Last post 05-08-2013 1:54 PM by racewatcher. 23 replies.
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  • 02-12-2013 1:39 PM

    Cassette change question on 2013 R3

    Just recently picked up a 2013 R3 Ultegra which comes stock with a 52/36 sprocket and 11-25 cassette.  I ride some hilly areas and am trying to keep my heart rate down so am planning to move to a 12-30 cassette.  Do I need to change anything besides the cassette or bolt in (with some adjustment) and go?

  • 02-12-2013 3:26 PM In reply to

    Re: Cassette change question on 2013 R3

    Unless I am missing something, this should be a straight forward swapping of the cassettes.

     

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  • 02-12-2013 4:03 PM In reply to

    Re: Cassette change question on 2013 R3

    You "may" have a couple of minor issues...

    1) I believe Shimano lists a max 28T on the Shimano short cage RD, but I'm not sure if that will present a big problem considering it's just an extra 2

    2) your chain length will likely be a bit short, it "may" work in some combos, but once you get over the 25T it may feel a bit "draggy" (mainly in the big ring)

    Just as another suggestion, the 28T might be enough for your hilly rides, so outside of a longer chain the RD will be fine.  Also, lets say the 36x28 is not low enough for your hilly rides, last resort will be to swap for a 50/34 chainring combo, which will work on your existing 110BCD (bolt circle diameter) compact cranks.

  • 02-12-2013 4:05 PM In reply to

    Re: Cassette change question on 2013 R3

    Can you post pics of your R3?  I have yet to see one in person and pics on the web are mostly stock ones.  I'm curious if the silver is shiny or matte.  Thanks!
    Cervelo R3, Specialized Tricross, Eighthinch Fixie
  • 02-12-2013 4:27 PM In reply to

    Re: Cassette change question on 2013 R3

     It's a shiny finish.

     And most likely I will pickup some Praxis 50/34 black chainrings so I don't need to worry about it. 

  • 02-12-2013 5:17 PM In reply to

    Re: Cassette change question on 2013 R3

    Go 50/34 and 11-28 and you won't regret it for the mountains.

    And the 4% higher cadence probably will go almost unnoticed  unless your holding

    35 mph on the flats.

    Aloha,

    Jeff

    2014 R3 DA9070(Di2)Zipp404Firecrest Carbon Clinchers, Powertap SL+-SoCal
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  • 02-12-2013 7:38 PM In reply to

    Re: Cassette change question on 2013 R3

     thanks, it looks great! what size frame is that?

    Cervelo R3, Specialized Tricross, Eighthinch Fixie
  • 02-12-2013 8:10 PM In reply to

    Re: Cassette change question on 2013 R3

    SteveFromNYC:

     thanks, it looks great! what size frame is that?

    It's a 48.  Initially I was going with a 51 with a shorter stem, but for sizing the fitter had me try a 48 and it fit me like a glove so the fitter kept me on the 48.  Anyhow, I love the look of road and mountain bikes when seat post is high up there above the stem.
  • 02-13-2013 4:06 PM In reply to

    Re: Cassette change question on 2013 R3

    Hutch:

    You "may" have a couple of minor issues...

    1) I believe Shimano lists a max 28T on the Shimano short cage RD, but I'm not sure if that will present a big problem considering it's just an extra 2

    2) your chain length will likely be a bit short, it "may" work in some combos, but once you get over the 25T it may feel a bit "draggy" (mainly in the big ring)

    Just as another suggestion, the 28T might be enough for your hilly rides, so outside of a longer chain the RD will be fine.  Also, lets say the 36x28 is not low enough for your hilly rides, last resort will be to swap for a 50/34 chainring combo, which will work on your existing 110BCD (bolt circle diameter) compact cranks.

    So the Short Cage derailleur comes stock on the bike?  How can I tell?

  • 02-13-2013 8:08 PM In reply to

    Re: Cassette change question on 2013 R3

    I think a 50/34 chainring and 12/25 would be a very good setup. If you just bought the bike maybe see if they would swap chainrings? the cassettes are usually cheaper an easier to change later if you still feel the need. Also good to have 2 cassettes if you get another wheelset.
    2013 Pinarello Dogma 65.1 Super Record EPS
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  • 02-13-2013 10:22 PM In reply to

    Re: Cassette change question on 2013 R3

    ApexR3:

    Hutch:

    You "may" have a couple of minor issues...

    1) I believe Shimano lists a max 28T on the Shimano short cage RD, but I'm not sure if that will present a big problem considering it's just an extra 2

    2) your chain length will likely be a bit short, it "may" work in some combos, but once you get over the 25T it may feel a bit "draggy" (mainly in the big ring)

    Just as another suggestion, the 28T might be enough for your hilly rides, so outside of a longer chain the RD will be fine.  Also, lets say the 36x28 is not low enough for your hilly rides, last resort will be to swap for a 50/34 chainring combo, which will work on your existing 110BCD (bolt circle diameter) compact cranks.

    So the Short Cage derailleur comes stock on the bike?  How can I tell?

    Comparison below... really it's all about the length of the cage.

    I believe even the short cage "may" work with a 30T.  Typically you see the long cage RDs with triples instead of doubles.   However the total capacity or chain wrap for that Ultegra short cage RD is 33T, the way you calculate it is below...

    In your case with what you want to run (52 - 36) + (30 - 12) = 34, that's why going with an xx-28T cassette will be optimal for best shifting performance in all combinations.

  • 02-14-2013 3:18 PM In reply to

    Re: Cassette change question on 2013 R3

    Thanks for the images.  I contacted my LBS and they said to go with an 11-28 since the derailleur is the regular short cage and not the 6700A short cage.  The pivot points are different on the 6700A to work with the 12-30 cassette.  I'll see how things go with the 52/36 - 11/28 combo goes and if I need more help on the hills I'll go with 50/34 chainrings. 

  • 04-10-2013 1:22 PM In reply to

    • racewatcher
    • Top 100 Contributor
    • Joined on 09-09-2011
    • Newfoundland and Labrador
    • Posts 214

    Re: Cassette change question on 2013 R3

    That's what I just did. I had 11-25, and put on an 11-28 cassette to go with my 50/34 up front. All it took was to swap the cassette, and check derailleur adjustment, especially high and low limit screws to keep the derailleur out of the spokes. Check cable tension and away you go. The short cage will handle 28 teeth, I'm not sure about 30, it might be a bit of a stretch for a short cage rear mech.
    racewatcher
  • 04-10-2013 9:00 PM In reply to

    Re: Cassette change question on 2013 R3

    Great looking bike! Congrats and enjoy the ride.
  • 04-11-2013 6:27 PM In reply to

    • spotter
    • Top 150 Contributor
    • Joined on 10-17-2008
    • Newcastle, Aust
    • Posts 143

    Re: Cassette change question on 2013 R3

    Just put on the 11-28 for the http://www.b2b.asn.au/ , normal run 11-23.

     

    Was very weird ridding in to work this morning, didn't get out of the Big Dog (well 50T not that big) and spin baby spin. Glad I will have a few more rides over the weekend to get use to it. 

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